An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
exists and is an alternate of . Unless it is somebody's initials, it probably stands for the metal, palladium (atomic symbol Pd) used in the making of white gold alloy, and also cast on its own to make various types of jewellry.